Systems Admin, Sr.

2 days ago

Pasay, National Capital Region, Philippines Stefanini North America and APAC Full time ₱1,200,000 - ₱2,400,000 per year

Details:
Job Description

  • Serve as the technical expert and escalation point for all Active Directory-related incidents and requests.
  • Design, implement, and manage complex AD environments including forests, domains, trusts, and replication.
  • Maintain and enforce Group Policy Objects (GPOs), including creation, auditing, and lifecycle management.
  • Ensure the security and compliance of AD environments through regular reviews, hardening, and monitoring.
  • Maintaining Group Policy Objects (GPOs), including creation, testing, deployment, and documentation.
  • Design, manage, and troubleshoot AD Sites and Services
  • Plan and implement site topology, subnet mapping, replication schedules and bridgehead server configuration.
  • Ensure DNS and AD environments are secure. highly available and compliant.
  • Support hybrid identity solutions such as Azure AD Connect and ADFS.
  • Troubleshoot and resolve replication issues, authentication failures, and DNS-related problems.
  • Collaborate with InfoSec and IAM teams to implement RBAC, privileged access management, and security baselines.
  • Lead AD upgrades, migrations, consolidations, and DR planning.
  • Maintain documentation of AD infrastructure, policies, and procedures.
  • Mentor junior team members and provide knowledge sharing and training.
  • Act as Second Level Liaison between client and service provider.
  • Define, write, and maintain PPM (Process and Procedure Manual) for the project
  • Assigned special projects
  • Analyze systems, review and implement improvements or upgrades to enhance user experience and to prevent capacity issues
  • Participate in rotating On-Call schedule and assist in after-hours Monthly Maintenance
  • Primary Lead in training and mentoring less-experienced members of the team.
  • Primary Lead in assigned special projects.

Job Requirements

Details:

  • 7+ years of hands-on experience with Microsoft Active Directory in a large-scale enterprise environment.

  • Expertise in:

  • ADDS, DNS, DHCP, DFS, and GPO management

  • Kerberos, LDAP, NTLM, and authentication mechanisms

  • AD replication and health monitoring tools

  • Strong knowledge of Windows Server (2016/2019/2022).

  • Strong experience in troubleshooting AD replication and authentication across multi-site environment.
  • Experience with PowerShell scripting and automation for AD tasks.
  • Familiarity with security best practices for Active Directory.
  • Experience integrating AD with enterprise tools (e.g., MIM, Azure AD, ADFS, Okta, Duo).
  • Solid understanding of change management, ITIL processes, and incident escalation procedures.
  • Microsoft certifications (e.g., Microsoft Certified: Identity and Access Administrator Associate, MCSE, etc.)
  • Experience with hybrid cloud environments and identity federation.
  • Familiarity with auditing tools such as Quest Change Auditor or similar.
  • Knowledge of Active Directory disaster recovery and backup strategies.
  • Experience with DNS management tools and IPAM.
  • Experience supporting DNS in hybrid and cloud environments
  • Experience in AD disaster recovery, DNS failover, and high availability setups.

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